Grinding-machine.



PATENTED MAY-1611905.

J; BATH. GRINDING MACHINE. .APPLIOATION IILED AUG. 24,1904.

7 SHEETS-SHEET -1.

No. 790,099. Y PATENTED MAY 16, 1905.

J. BATH.

GRINDING MACHINE.

APPLICATION FILED AUG. 24, 1904.

yaw/e 7 SHBETSSHEET 2.

Np. 790,099 I PATENTED MAY 16, 1905.

J. BATH.

GRINDING MACHINE. IAYPLIOATION IILEDAUG. 24, 1904. I 1 7 sums-sumN0.v90,099 f .PA-TENTEDMAY16J9'O5.

J. BATH.

GRINDING MAGHINEL APPLIOATION FILED AUG. 24, 1904. i

7 SHEETS-SHEET PATENIED MAY 16, 1905.

J. BATH. GRINDING MACHINE. APPLICATION FILED AUG. 24, 1904.

7 SHEETS-SHEET 5.

v No. 790,099. PATENTED MAY 16, 1905.

J.v BATH.

GRINDING MACHINE.

APPLIOATION FILED AUG. 24, 1904.

7 SHEETS-SHEET 6.

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Q i Q PATENTED AY 16, 1'905.-

No., 7 90,099; I J. BATH.

GRINDING MACHINE. I

I APPLICATION FILED AUG. 24, 1904(- 7 SHEETS-SHEET 7- UNITED STATESPatented May 16, 1905'.

PATE T OFFICE.

JOHN BATH, FITCHBURG, MASSACHUSETTS.

GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 790,099, dated May 16,1905. i Application filed August 24, 1904. Serial No- 222,000.

To (LZZ whom it may concern:

Be it known that I, JOHN BATH, ofFitchburg, in the county of Worcesterand State of Massachusetts, have invented certain new and usefulImprovements in Grinding-Machines, of which the following isaspecification.

This invention relates to machines'for grinding and finishing to exactsize metal tools and parts of machinery, and comprises the new anduseful improvements. in such machines hereinafter described andclaimed.

In the drawings forminga part of this application, Figure 1 represents afront elevation, partly in section, of a machine embodying theimprovements constituting the subjectmatter of my invention. 7 Fig. 2 isa side elevation, partly in section, of the machine as seen from theright of Fig. 1. Fig. 3 is a perspective rear view of the machine. Fig.

4 is a perspective front view ofthe upper.

part of the machine,-sho,wing the auxiliary internal grinding-wheelhereinafter described in position. Fig. 5, is a view similar to thatshown in Fig. 4, but showing a different tool in position for operation.Fig. 6 shows a horizontal section taken on the line 6 6 of Fig. 2. Fig.7 is a detail plan view of the head-stock of the machine, and Fig. 8 across-sectional view taken on the line 8 8 of Fig. 7. Fig. 9 isalongitudinal sectional view, on an enlarged scale, of the same. Fig. 10is an enlarged detail view, in longitudinal section, of one end of thetool-supporting spindle or arbor with a grinding-tool in positionthereon. Fig. 11 is an enlarged side elevation of the spindle-carryinghead, showing the manner 'in which the spindlebearing blocks are securedto the head. Fig.

, 12 is a side elevation of a device for truing the grinding-tool. Fig.13 is a cross-section of the bed or platen. Fig. 14 shows a horizontalsection, on a reduced scale, of the machine-support, taken on the line14 14 of Fig. 2.

The machine consists of a wide low base 1 of generally cylindricalshape, slightly tapered from bottom to-top, the top being formed with aninwardly-directed flange e, having a flat upper surface to which isdetachably secured in any suitable manner, as by screws 2, an uprightsupport 3.

The sup-.

port 3 is formed with a wide circular flange 63 of substantially thesame diameter as the .upper surface of the base 1, constituting the.threaded portion 4, into which is screwed a correspondingly-threadedprojection 5, extending from the bottom of a standard 6. The standardmay be removed from the support by unscrewing the projection 5 from thethreaded portion 4, and thereby ac- 5 cess is given through the openingin the support 3 to the bolts which connect the support and basetogether. An upright annular rib g, surrounding the column, isformedonthe upper surface of the flange 63, and between 7 the column and the ribis a groove 85, for a purpose to be described. The outer surface of therib g and the upper surface of the flange 63 beyond the rib are finishedoff to form a bearing for an annular swivel-knee 61, which supports thecarriage and table for holding the work and which will be furthermorefully described.

The forward side of the standard 6 is provided with a vertical guideway7, upon which is adjustably mounted a spindle-carrying head 8, havingbearings for a spindle d, which carries the grinding-tools 1O 11. Thespindlebearings consist of split boxes 12, having boltreceiving flanges13, through whih they are 5 securely fastened in recesses in the head 8by means of bolts 15, and having flanges 14, through which pass bolts16, whereby the bearings'may be adjusted to fit the spindle d. Thespindle-carrying head is adjusted vertically along the guideway 7 bymeans of a rod 17, attached to the upper end of the head and passingupward therefrom through the forwardly-extending ears 18 18 of the head6, and a long nut 19, which engages with an enlarged screw-threadedportion 20 of the rod 17 The nut 19 is snugly fitted into a sleeve 21,held between the ears 18, which carries a hand-wheel 22, and is securedtherein, so that when the sleeve is rotated by the hand-wheel I 9 thenut is also rotated, thus causing the rod 17 and head 8 to be raised orlowered, according to the direction in which the hand-wheel is turned.

In order to gage the position of the spindle-carrying head, the rod 17is provided with a graduated scale 23, readings from which indicate thedistance of the head above the worksupport. To the upper end of the nut19 a cap 24 is secured, by means of aset-screw 25, so that it rotateswith the nut, but has no motion longitudinally thereof. The upper surface of the cap constitutes the fixed readingline for thescale on therod, and on the lower edge of the outer surface of this cap aregraduations 26, which by reference to amark 27 on a stationary part ofthe machine-frame indicate fractions of a revolution of the cap 24 andnut 19. The cap thus constitutes a dial by which fractions of thedivisions of the scale 23 may be measured. By means of this doublesystem of graduations the position of the head may be determined withgreat accuracy and a possibility of fine adjustment thereby obtained.

The grinder-carrying spindle (see Figs. 1, 6, and is formed with reducedend portions, of which one is tapered, while the other is straight, andthereon are mounted wheelbushings for supporting the emery wheels whichconstitute the grinding-tools. The construction of the spindle,bushings, and wheels may be readily understood from aninspection of Fig.10,' which shows the right-hand end of the spindle (Z. The wheel-bushing28 is formed with an internal tapered bore to fit the taper of thespindle and with a shoulder 29 and reduced portion 31 to receive theemery-wheel 10. The emery-wheel is clamped againstthe shoulder 29 by anut 32, screwed on the threaded outer end of the reduced part of thebushing, and the latter is secured to the spindle by a nut 33, threadedupon a reduced extension 34 of the spindle (Z. Slipping of the bushingupon the spindle may be prevented by means of a suitablefeather-and-slot connection, consisting of a feather 1?, secured to thespindle, and a slot Z; in the bushing, into which the feather projects.WVide flanges are formed on the bushings, which flanges are providedwith slots 35 for the reception of a spanner-Wrench, by which thebushings and spindle maybe held stationary while a tool is being securedin position or removed. The bushing m on the other end of the spindle,which holds the wheel 11, is similarly constructed, except that the boreis not'tapered. By means of a spanner engaged in a slot of eitherbushing the spindle may be held to allow the other bushing to be rotatedfor removal from it. By constructing the flanges on the bushing withconsiderable width I am enabled tomake the bore with the greatestpossible diameter, thereby obtaining a large area of contact with thespindle, while at the same time being able to make the reduced portion31 with a very small external diameter, and also strengthen the bushingand provide room for the spanner to engage the flange. The bushing m isheld in place by a screw a, threaded into the end of the spindle, bymeans of which wear may be taken up and the bushings held against theends of the spindle-bearings to prevent end play of the spindle.

The spindle and tools are rotated by a belt 38 passing over a pulley 36on the spindle (l, driven by a pulley 37, secured to a shaft 39, mountedrotatably on an arm 10, which is pivoted at 42 to a bracket 43 on thebase of the machine. The pulley 37, and thereby the spindle (Z, isdriven at any desired speed by a stepped pulley H, secured to the pulley37, which receives motion from a suitable source of power. An importantfeature of my invention is an automatic device for keeping the belt 38at a uniform tension for all positions of adjustment of thespindle-head. As the spindle moves up and down it would be farther awayfrom the shaft 39 at some times than at others if the shaft 39 were heldin stationary bearings, making the belt sometimes tight, sometimesloose, and it is therefore necessary to maintain the distance betweenthe spindle and shaft nearly uniform. To this end the bearing for theshaft is made movable and adevice for moving the bearing is provided.Said device consists of a bar 1-1, one end of which extends throughthearm 40 and is held in adjusted position relatively thereto by collars45, threaded on the bar on opposite sides of the arm, and which isconstantly pressed away from the spindle-head by aspring 46, surroundingthe bar and bearing at one end against a shoulder e7 on the bar and atthe other end against an abutment 48, mounted in the standard 6 of themachine. The pivotal connection of the arm 10 with its support permitsthe arm to swing freely toward and away from the standard, its outwardmovement being limited by a nut 19 on the inner end of the bar, whichcontacts with the abutment 48 on the opposite side from that againstwhich the spring +t6 hears. The collars &5 can be adjusted on the bar 41to move the arm 40 relatively to the bar and vary the tension of thebelt and spring.

The work is carried by a head-stock a and foot-stock b, mountedadjustably on a bed or platen c by means of headed bolts 50, seated inundercut slots in the platen, which extend through the base-plates 51 52of the head and foot stocks and clamp them in position by means of nutsthreaded thereon. The platen 0 is swivelly mounted by a pivot 53 on atable 54, which latter is supported so as to be longitudinally movableon supporting and guiding wings 55 56 of a carriage 57, said wings beinglocated under opposite sides of the table, whereby great rigidity andstability is given the table. Feeding mechanism is provided by which tomove the table 54 and the work carried thereon past the grinder; butsuch mechanism forms no part of my present invention and need not,therefore, be here described. By means of the swivel con-- nectionbetween the platen 0 and table 54 the work may be set at an anglerelatively to .the line of feed and clamped in position by means ofbolts 58, with nuts thereon, held by the table and extending throughslots 59 in the platen, whereby a taper may be cut on the work.-

The carriage 57 is mounted on guide-ribs 60, formed on the annularmember or swivelknee 61, before referred to, which surrounds the support3 and is formed with a lateral flange 62, restingon the lateral flange63, formed on the base of the support in such manner as to be capable ofsliding thereon rotativelyabout the axis of the support, and is held inany desired position of'adjustment by a clamp consisting of abolt 64,the head of which extends into an undercut slot extendingcircumferentially about a portion of the flange 63, while its shankpasses through the flange 62 and is fitted with a clamping-nut 65. Asmay be-readily understood, a turn of the nut 65 in the proper directionwill draw the head of the bolt 6 L upward and bind the two flangestogether. Graduation marks forminga scale of any desired character aremade on one of the flanges and a single mark on the other, by which theangle through which the member is turned may be determined. As thecarriage, table, and work are all carried by the swivel-knee 61, thisadjustment constitutes an additional instrumentality by which the workmay be inclined, and this connection with the adjustment of the platenabove described makes'it possible to grind the work on any desiredangle. The guideribs 60 project forward beyond the front wall of theswivel-knee in order to give provision for suflicient travel of thecarriage, and they are supported by wlngs or brackets 0, which areconnected to the under sidesof the ribs and to the front wall of theknee. These wings are an important feature of my inven' tion, as theygive rigidity to the guides 60 and enable the carriage and work to beheld unyieldingly, thereby insuring accuracy of operation. If thecarriage were permitted to yield, the work would spring away from andtoward the grinder, causing chattering and loss of accuracy. Across-feed for moving the work toward and from the grinding-tools isprovided, consisting of the screw 66, threaded into a nut 67, secured tothe knee 61 and held by the carriage 57 in such a manner that it mayrotate freely therein, but is held from longitudinal motion relativelythereto, as is clearly shown in Fig. 2. The swivel-knee6l is providedwith an internal annular bearingsurface, which by engaging with theouter surface of the rib g retains the knee, prevent-- ing any sidemotion of the knee except rotation about the axis of the support. As theforward wall of the knee is extended beyond the circumference of the ribg, as shown in joined with the side walls of the knee.

from the table, the function of which is later now be described. Thebase 51, as before stated, is securedtothe platen 0 by means of in anydesired position.

bolts 50, and in addition is guided and held in correct alinementthereon by a rib 68, which projects into a longitudinal groove 69 in theplaten. The base of the foot-stock also has a similar construction. Itwill be observed thatby reason of this construction the necessity ofproviding a projecting rib on the platen or bed 0 for alining the headand foot stocks,.

which is an objectionable feature in the machines heretoforeconstructed, is avoided, and I am enabled to remove the head and footstocks and place work with which they can- 7 not be used upon theplaten, clamping it in any desired position. This cannot be done withany ofthe grinding-machines known to -me, for in all such machines thereis a rib ex tending along the platen which restricts within narrowlimits the sizes and positions of the pieces which can be clamped on theplaten. The groove 69 also acts as a trough to con duct away Water whichmay fall on the bed.

Another feature of the head-stock is the construction which permits itto be turned so that the center it carried by it may be presented to onthe arc of a circle whose center is the pivot,

is formed on'the head-stock casting, resting on the base-plate, and theouter edge of the flange is provided with a graduated scale by which theangle to which the head-stock is turned is indicated. Thus the centermay be presented tothe grinding-Wheel and its point ground down to anydesired angle, as shown in Fig.

.the flange 71.

7, the angle being measured by the scale on The center It is heldfriction- &

ally in the tapered bore of a quill 72, rotatably mounted in a bearingin the head-stock casting, and may be turned by a pulley 73, mounted onthe quill and driven by a belt from a suitable counter-shaft or othersource of power. The pulley loosely surrounds the quill and may befastened to it by a face-plate 74:, which is secured to one side of thepulley by set-screws 75 and forms one of the flanges of the pulley andextends over the end of the quill, to which it may be attached by asetscrew 76. The set-screw 7 6 is normally seated with its entire lengthin a tapped hole in the quill, and when it is desired to connect thequill to the pulley the set-screw is screwed out until its outer endprojects through a hole in the face-plate and engages the latter.Normally, however, the face-plate and quill are disconnected and thequill is held stationary in its bearing in the head-stock by ascrewclamp 200, (shown in Fig. 8,) which may be turned to draw the ears201 of the bearing together and cause the bearing to bind on the quill.The only time the quill and center are rotated is when the center isbeing ground. At all other times the center is stationary and the workturns on it, being rotated by a pin 9", attached to the pulley, whichengages a dog clamped to the work. The quill 7 2 is held in positionwith the pulley 7 3 seated against one end of the hearing by ascrew-stud 77, threaded into the end of the quill and having a taperedhead seated in a countersunk seat in the end of the quill, and athreaded extension 78, which is surrounded by a nut 79, having a flange81, which rests against the other end of the bearing and is clamped'inposition by a set-screw 80, the nut 79 being partially divided by a deeptransverse slot and the setscrew being extended through both sectionsand when tightened causing them to be sprung together and tightly gripthe threads of the stud. The nut is adjusted to take up the wear betweenthe ends of the bearing and the pulley and nut.

An important feature of the invention is the shape and arrangement ofthe outer surface of the quill, which forms the bearing for the pulley73. As shown in. Fig. 9, the end of the quill on which the pulley ismounted is tapered outwardly, and the bore of the pulley is similarlytapered. The side of the pulley is flush with the end of the quill andboth are covered by the face-plate 74. This structure serves both toexclude grit from the bearing and afford a provision by which the pulleymay be caused to seat always snugly on its bearing and run perfectlytrue, for when the bearing gets worn the face of the pulley needs onlyto be scraped ofl a little and the screws 75 tightened to make thepulley as snug as before. This cannot be done with a cylindricalbearing, and with a cylindrical bearing also grit is liable to work in,which is impossible with my construction, where even if grit should workin between the face-plate and quill it could not possibly get betweenthe quill and the pulley, as the centrifugal force prevents it movingalong the inclined surface toward the axis of the quill, and there isthis further advantage that with this construction there is nopossibility of the pulley running ofl" the end of the hearing.

A cooling liquid, such as water, is delivered to the grinding-wheel 10from a pipe 82, and from the wheel the waste water drops into a trough83, formed on one side of the table 54; and having an outlet 84 near itsmiddle portion, through which the water runs into the puddle-pan p inthe knee 61, from which it overflows into the annular groove 85, formedin the base of the support 3, which constitutes awater-receptacle.connected to the support, from which an opening 86leads to a pipe 87, fastened to the bottom of the support and extendingdownward, then laterally outward through one side of the base 1. Throughthe channel thus formed the water is conducted away from the machine toa tank or other receptacle, from which it may be returned to the pipe 82by a suitable pump. \Vhen work of small size is being ground, thecarriage is in near enough to the support for the outlet 84 to be overthe groove 85, and in such case the water drops directly into thegroove; but usually the water falls first into the puddlw pan, which iswide enough, as shown in Fig. 14, to catch the drip from the trough innearly all positions of the table. hen the puddlepan becomes full, thewater runs over the gooseneck 94, which acts as a shield to prevent thewater and grit working into the bearing between the knee and support,into the groove 85, and thence through opening 86 and pipe 87 to thetank. A large proportion of the grit is deposited by sedimentation inthe puddle pan, so that only a small amount passes with the water to thepump. To protect the platen c from the water and grit thrown off fromthe grinding-wheel, there is provided a shield 88, attached to a bar 90,supported in standards 91 92, carried by the bases of the head-stock andfoot-stock, respectively, the base of the head-stock being extended sothat the location of the standard 91 thereon is far enough away from thehead-stock to permit free rotary adjustment of the latter. The shield 88extends rearwardly downward over the edge of the platen a, so that allthe water which would otherwise fall on the platen is caught by theshield and caused to run ofl into the trough 83. Similar protection isafforded the cross-feed screw 66 by a shield 93, which is attached tothe nut 67 and surrounds the screw.

In some classes of work it is necessary to grind out an internalopening, and in such cases the auxiliary wheel shown in Fig. 4 is used.At one side of the standard 6 is an arm 95, having a stud 951 formed onit, which is Fig. 2.)

seated in a bore in the standard 6 and forms a pivot for the arm. Apin96 passes through the arm and standard and screws into a nut 97 fastenedto the standard on the other side. The pin is formed with a shoulderbearing against the arm and with a handle 98, by which the pin may beturned, so as to force its threaded end farther'into the nut and pressthe shoulder against the arm, clamping it in position for operation, asshown in Figs. 3 and 4, or in the inoperativeposition. (Shown in Thefree "end of the arm 95 has an opening in which may be clamped a sleeve99, carrying journaled therein a spindle 100, which is provided with aninternal grinding-wheel 101. The spindle 100 is driven ata high rate ofspeed from a pulley 10 1, substituted on the spindle d in place of thegrinding-wheel 10 when this tool 101 is used, through a belt 103-passing over the said pulley and a pulley 102 on the'spindle 100. Whenwork of this character is being performed, the center/z of thehead-stock is removed and a chuck 105, capable of holding the work,substituted therefor. Other tools as well as the wheel may be used. Forinstance, a stud may beinserted in the arm and a cutter which is to beground mounted on the stud. The cutter is turned on the stud to bringeach tooth in succession to the grinder and moved from side to side togrind of]? the whole width of the tooth A lug 112 is formed on the hubportion of the arm 95, extending in the opposite direction beyond thepivot, and to thelug is secured a stud 113, which acts as a holder onwhich a guide for holding a twist-drill while being ground may bemounted.

It will be seen that the base 52 of the footstock is formed with alateral ledge or lip 520, which extends horizontally toward theheadstock, being located in line with the head and foot stocks. Thisledge is adapted to receive an auxiliary tool-holder 107, which normallyrests on the ledge and is secured thereto by a bolt 108, passing througha slot 109 in the base of the holder and engaged in a tapped hole in theledge. By loosening the bolt the tool-holder may be adjusted, and byremoving the bolt the holder may be entirely disconnected from thefoot-stock; but as a general thing the holder is allowed to remain on vthe ledge 520. This holder is adapted to supsquare off the face of thegrinding-wheel, the holder 107 is adjusted so that the diamond is '11]position to engage the face of the wheel,

the latter is set in motion, and the foot-stock is moved past the wheel.When tapered work is to be ground, the face of the wheel maybe trued onthe same angle as the line of feed. So far as I am aware I am the firstperson to provide the foot-stock of a grinding-machine with means bywhich auxiliary tools may be carried by the foot-stock and also thefirst to provide a means on the foot-stock for holding workindependently of any other support.

enumerated form a machine-frame which is stationary at all times andnever affected by any adjustments of the tool and work holders,

as the holders are 'adjustably mounted on guides rigidly connected tothe frame instead of being rigid with adjustable parts of the frame, asis the case with all the machines now known. The working parts aretherefore ust as unyielding when in their extreme outward positions aswhen at their inner l1m1ts of adjustment'and work can be done asaccurately in one position as in the other. This is not the case in anyother machine. Hitherto it has never been possible to grind the teeth oflarge reamers without removing them. from the holder and grinding themseparately or to grind large taps, snap-dies, &c., of over two feet indiameter with any considerable accuracy on account of the distortion towhich the supporting parts of the machines now in use are liable when attheir extreme limits of adjustment; but with this machine I can work asaccurately on large pieces as on small ones that is, within oneten-thousandth of an inch of the required size.

Having thus explained the nature of my invention and described a way ofconstructing and using the same, though without attempting to set forthall of the forms in which it supported with respect to said standard, abelt passing about said spindle and shaft, and automatic means forforcing said shaft away from said spindle to produce tension in saidbelt.

3. In a machine of the character specified, a standard, a spindle-headadjustably mounted on said standard, a rotatable spindle carried by saidspindle-head, an arm pivotally connected with said standard, a pulleymounted on said arm and arranged to swing about the pivotal connectionof the arm toward and away from said spindle, a belt passing about saidspindle and pulley, and spring-pressed means arranged to move saidpulley away from the spindle, whereby tension is produced in said belt.

4. In a machine of the character specified, a standard, a spindle-headadjustably mounted on said standard, a rotatable spindle carried by saidspindle-head, an arm pivotally connected with said standard, a pulleymounted on said arm, a belt passing about said pulley and spindle, a barconnected with said arm, and a spring carried by said bar and arrangedto press against the standard and move the arm about its pivotalconnection away from said spindle.

5. In a machine of the character specified, a standard, a spindle-headadjustably mounted on said standard, a rotatable spindle carried by saidspindle-head, an arm pivotally connected with said standard, a pulleymounted on said arm, a belt passing about said pulley and spindle,-a barconnected with said arm, a spring carried by said bar and arranged topress against the standard and move the arm about its pivotal connectionaway from said spindle, and means for adjusting the bar relatively tothe arm.

6. In a machine of the character specified, a standard, a spindle-headmounted adjustably on said standard, means for adjusting said spindle-head,com prising a screw-threaded rod and a nut surrounding saidrod, one of said last-named parts being connected to the spindle-headand the other to the standard, and means for indicating the adjustedposition of the spindle head, comprising a graduated scale connectedwith the rod, and a second scale surrounding the rod connected with thenut and constructed to measure fractions of the divisions of said firstscale.

7 In a machine of the character specified, a standard, a spindle-headadjustably mounted thereon, a rod connected to the spindle-head andprovided with a screw-threaded portion, a nut supported by the standardand arranged to engage the threaded portion of the rod, whereby thespindle-head may be adjusted on the standard, a scale formed on the rodfor indicating the adjusted position of the spindle- 8. Inagrinding-machine,atool-spindlehaving a tapered portion, agrimling-wheel, a wheel-bushing constructed to carry the gri nding-wheeland formed with a tapered bore to engage the tapered portion of thespindleand provided with flanges having slots, and a key mounted in saidtapered portion projecting into a slot in the bore of said bushing.

9. In a machine of the characterspecified, a base, a one-piece supporthaving an integral extended flange secured directly to said base and acentral tapered column, a standard rigidly connected to said column, anda grindingwheel adjustably mounted on said standard.

10. In amachine of the character specified, a base member having a fiatupper surface, a support comprising a wide base portion and a shorttapered column having a threaded portion mounted on the upper surface ofthe base member and rigidly secured thereto, a standard having athreaded lower part engaged with the threaded portion of the support, aguideway secured to said standard, and a spindle-head mounted on saidguideway.

11. A grinding-machine comprising a base, a support provided with alongitudinal aperture resting upon said base, means for securing saidsupport to said base, and a standard detachably connected to thesupport, so constructed and arranged that removal of the standard willgive access through said aperture to said securing means.

12. In a machine of the character specified, a bed or platen having aplane top and a longitudinal V-shaped groove and a head-stock supportedon the bed or platen and provided with arib projecting into and bearingagainst the sides of said groove.

13. In a machine of the character specified, work-holding meanscomprising a head-stock, a base-plate, a support having a longitudinalV-shaped groove, a rib on the base-plate projecting into said groove andbearing against the sides thereof, and a pivotal connection between thehead-stock and base-plate.

14:. In a machine of the character specified, a frame, a work-holdingcarriage, a member mounted on the frame, having a guide for saidcarriage, and separated parallel webs or ln'ackets formed on said memberand connected to the guide for the carriage beneath the same.

15. In a machine of the character specified, a frame, a work-holdingcarriage, a member mounted on the frame, having a guide for saidcarriage, and separated parallel webs or brackets formed on said memberprojecting laterally to as great an extent as said guide and connectedthereto beneath the same to support the guide and the carriage, theunder edges of the webs being convexedly curved.

16. A grinding machine comprising a frame, a member adjustably mountedthereon and provided with laterally-extending vertical Webs or bracketsseparated by aspace, guides mounted on and supported by said brackets,

engagement with said nut. v

17. In a grinding-machine,a frame provided with an. annular bearing, andan annular member mounted on'said bearing for swiveling motion thereonand having laterally-extending vertical webs or brackets separated by aspace, guides mounted on and. supported by said brackets,"a nutconnected to said annular member in the-space between the brackets, a

work-holding carriage slidablyimounted on sa1d guides, and ad ustingmeans carried by sa1d carrlage in engagement with said nut.

18. In a grinding-machine, a frame'pro vided with adjacent annularflanges having extended horizontal and vertical bearmg-surfaces, anannular member or swivel-knee provided with a complementary verticalbearingface and a lateral flange having a horizontal bearing-surfacemounted on the frame in engagement with said bearing-faces, whereby saidmember is enabled to be moved rotarily about said frame, and a guidewaysecured to said annular member for carrying the worksupporting slides ofthe machine.

19. In a grinding-machine, a frame provided with adjacentannular'flanges having extended horizontalcand verticalbearing-surfaces, an annular member or swivel-knee provided with acomplementary vertical bearingface and'ailateral flange having ahorizontal bearing-surface mounted on the frame in engagement with saidbearing-faces whereby said member is enabled to be moved rotarily aboutsaid frame, clamping means engaged with said lateral flanges adapted toforce said horizontal i. surfaces into frictional engagement to holdsaid annular member in adjusted position, and a guideway secured to saidannular member for carrying the work-supportvided with adjacent annularhorizontal and vertical bearing-surfaces, an annular member orswivel-knee provlded w1th complementary bearing-faces mounted on theframe in engagement with said bearing-faces, whereby sa1d member isenabled to be moved rotarily its end for adjusting, and means forclamping saidquill-in the bearing.

22. In a machine of the character specified,

a head-stock having a bearing, a quill ,journaledin said bearing andhaving provisions for holding a center, a pulley loosely mount-' ed onsaid quill, and means for detachably securing said pulley to said quill,comprisinga plate extending across the end of the quill.

.and covering the junction between the pulley and quill detachablysecured to the pulley and the quill. r v

23. In a machine of the character specified, a head-stock having abearing, a quill or spindle rotatably mounted therein and provided witha conical external bearing portion at its end, the greatest diameter ofsaid conical portion being at the end of-the quill, a pulley having acomplemental internal bearing-surface freely rotatable on said conicalportion, and means connectedto said pulley for taking up wear in the'conical bearing.

24. In a machine of the character specified, a head-stock, a quillmounted in said headstock, the outer surface of the quill being formed.with a conical portion tapering in. ward from the end toward the centerof the quill, forming a bearing, a pulley having a tapered bore mountedon the quill in engagement with the'tapered portion thereof, and aface-plate secured to the pulley and extending over the end'of thequill.

25. In a machine of the character specified; a head-stock, aquillmounted rotatably in said head-stock, the head-stock having provisionsby which the quill may be held stationary, the external surface of thequill being formed witha cylindrical portion and a conical portionflaring outward toward the end of the quill, a pulley mounted on theconical portion of the quill for rotation thereon, aface-plate securedto one side of the pulley and extending over the end of the quillcovering the line of division between the pulley and quill, means fordetachably connecting the face-plate to the quill, and a center mountedin the quill and extending through an orifice in the face-- plate.

26. In a machine of the character specified, a machine support, agrinding tool carried thereby, a work-holding table mounted for rotaryadjustment about the support, means for supplying water to the tool, andprovisions for receiving and leading away the waste water, comprising atrough connected to the table and having an outlet, a water-receptacleconnected with the support surrounding the' same and located to receivethe water falling from the outlet of the trough, and apipe .connectedwith said water-receptacle.

27. In a machine of the character specified, a machine-support, agrinding-tool carried thereby, a work-holding table, a support for thetable, comprising an annular member surrounding the machine-support andadj ustably carried thereby, whereby the table may be moved rotarilyabout the machine-support, means for supplying water to the tool, andprovisions for receiving and leading away the waste water, comprising atrough connected to the table and having an outlet, an annularwater-receptacle connected with the machinesupport and located below thetrough-outlet, and a pipe connected with said water-receptacle.

28. In a grinding-machine having a grinding-tool and a water-supplytherefor, a machine-support having a central column and a vertical ribsurrounding the column and forming between the rib and column an annulargroove, an annular knee mounted swivelly on said support, and providedwith a rib in engagement with the rib on the support, and a waterreceptacle adjacent the rib, a workholding table mounted on said kneeand having a trough connected thereto and provided with an outletlocated above said water-receptacle, and a pipe carried by the1naehine-support and connected to the water-receptacle of the support,the trough, water-receptacle, groove, and pipe constituting a water-leadfor carrying away the waste water.

29. In a grinding-machine, a support having an extended base formed withan annular bearing on its upper surface, a central column, agrinding-wheel mounted on the column, means for supplying water to thewheel, an annular vertical rib formed on the base of the supportadjacent the annular bearing and forming between itself and the columnan annular groove, a pipe carried by the support and connected with thegroove, an annular knee mounted swivelly on the bearing aforesaid andformed with avertical rib in contact with the rib on the support, and adepression or puddle-pan adjacent the rib, a work-holding table carriedby the knee, a trough conneeted to said table and formed with an outletlocated above said puddle-pan, and a flange or gooseneck connected tothe annular knee and extending over the rib and into the groove on thesupport, for excluding water and grit from the bearing between thesupport and knee, the trough, puddle-pan, groove, and pipe constitutingprovisions for receiving and leading waste water away from the machine.

30. In a machine of the character specified, a grinding-tool, a bed,head and foot stocks having base portions resting on said bed, thehead-stock being separate from its base and pivoted for rotaryadjustment thereon, supports held on the base portions of said head andfoot stocks, respectively, the head-stock base portion being extendedbeyond the swivel head-stock and the support thereon placed free of thehead-stock, whereby interference of the swivel head-stock with thesupport is avoided and free rotary movement of the headstock permitted,a bar held in said supports, and a shield connected to said bar andextending downward over one edge of the bed.

31. In a machine of the character specified, a grinding-tool, awork-holding carriage, a feed-screw for said carriage, and a detachableshield projecting over said feed-screw to protect the screw from waterand grit falling from the grinding-tool.

32. In a machine of the character specified, a standard having a bore, anut fixed to said standard in line with the bore, an arm having a studthereon mounted in the bore, and a screw extending through said arm,threaded into said nut and having a portion bearing on the arm forclamping said arm in position.

33. In a machine of the character specified, a standard, a nut securedthereto, an arm having a hub portion pivotally mounted on the standard,a screw extending through said huh portion, threaded into said nut andhaving a shoulder engaging 'the outer surface of the hub portion, a lugformed on the hub portion, and a stud carried by the lug for supportingwork.

34. In a machine of the character specified having a bed and ahead-stock supported thereon, a foot-stock adj ustabl y mounted on thebed and consisting of a base portion and a standard, the base portionformed with a projection extending toward the head-stock, havingprovisions for holding an auxiliary tool.

35. In a machine of the character specified having a bed and ahead-stock supported thereon, a foot-stock ad justably mounted on thebed having a base formed with a projecting ledge extending from thefoot-stock in line with the head-stock, and a tool-holder detaehably andadjustably mounted on said ledge, the toolholder having provisions forcarrying an auxiliary tool.

In testimony whereof I have aiiixed my signature in presence of twowitnesses.

JQHN BATH.

Vitnesses:

ALvAir M. LEVY, ARTHUR L. GoonwIN.

